.main-window {
  display: flex;
  height: 100vh;
  width: 100vw;
  background-color: #fff;
}

.sidebar {
  width: 300px;
  height: 100%;
  border-right: 1px solid #ddd;
}

.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.welcome-view {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: #666;
}